Sold close to 860,000 shares for about $35 a piece. This brings its stake in BNY Mellon down to about 9.8% Berkshire's remaining stake in the company is worth about $3.3 Billion. BNY Mellon stock has plunged by more than 25% since the start of the year, reflecting a broader market decline fueled by the coronavirus pandemic.
Source: Business Insider
https://markets.businessinsider.com/news/stocks/warren-buffett-berkshire-hathaway-sold-30-million-bny-mellon-stock-2020-4-1029081968